According to Kelvin-Planck's statement of second law of thermodynamics,

Mechanical Engineering : Engineering Thermodynamics - Quiz(MCQ)

it is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work

it is possible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work

it is impossible to construct a device which operates in a cyclic process and produces no effect other than the transfer of heat from a cold body to a hot body

None of the above

Correct Answer : Option (A) : it is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work

Recently Updated in Engineering Thermodynamics Questions

When work is dissipated into internal energy, what is the change in the disorderly motion of molecules.

increases

decreases

remains the same

None of the above

Correct Answer : increases

Explanation : We know that increase in internal energy causes more random motion.

The entropy change of a system between two identifiable equilibrium state is ___ when the intervening process is reversible or change of state is irreversible.

same

different

depends on the process

None of the above

Correct Answer : same

Which of the following is an example of low grade energy?

heat or thermal energy

heat from combustion of fossil fuel

heat from nuclear fission or fusion

All of the above

Correct Answer : All of the above